How did you read the codes? Peake?

That's bank 1&2 system too rich. Basically, it means the o2 sensors on bank 1&2 have too little oxygen in exhaust. do you get rough idle? misfire? Try cleaning maf sensor and clear codes. See if codes come back. But if MAF is gone, cleaning might not solve the problem. If you have more advanced ODB2 tool, you can read MAF live data.

Also, it could be a vacuum leak. 2 hoses to oil separator are tend to deteriorate soon. Check if they're gone. It could be just the faulty O2 sensor too but unlikely both are gone at the same time.